If this was your first lucid dream, it's quite common to be surprised. Think of it this way: you probably spend many days and maybe weeks practicing to get to your first lucid dreaming. In that time, you were learning and developing new skills. Well now that you've achieved the first lucid dream, the learning doesn't end there. You will probably spend many of your first few lucid dreams still learning and developing new different skills.

The next skill you should practice is a stabilization routine. I also think it's good to make a list of tasks. When you become lucid, practice the stabilization routine. Then recall which task you want to try and go for it. This keeps you focused so you don't wander off and lose lucidity or wake up.